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H2SO4-HNO3-H2O ternary system in the stratosphere (1974)

Kiang, C. S. ; Hamill, P.

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Publication Date: 2011-08-16

Description: Estimation of the equilibrium vapor pressure over the ternary system H2SO4-HNO3-H2O to study the possibility of stratospheric aerosol formation involving HNO3. It is shown that the vapor pressures for the ternary system H2SO4-HNO3-H2O with weight composition around 70-80% H2SO4, 10-20% HNO3, 10-20% H2O at -50 C are below the order of 10 to the minus 8th mm Hg. It is concluded that there exists more than sufficient nitric acid and water vapor in the stratosphere to participate in ternary system aerosol formation at -50 C. Therefore, HNO3 should be present in stratospheric aerosols, provided that H2SO4 is also present.

Keywords: GEOPHYSICS

Type: Nature; 250; Aug. 2

Format: text

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